LIFE SCIENCE

Detailed explanation-1: -They are what is known as primary producers of the ocean-the organisms that form the base of the food chain. Because they need light, phytoplankton live near the surface, where enough sunlight can penetrate to power photosynthesis.

Detailed explanation-2: -Phytoplankton are microscopic marine algae. Phytoplankton, also known as microalgae, are similar to terrestrial plants in that they contain chlorophyll and require sunlight in order to live and grow. Most phytoplankton are buoyant and float in the upper part of the ocean, where sunlight penetrates the water.

Detailed explanation-3: -Primary producers-including bacteria, phytoplankton, and algae-form the lowest trophic level, the base of the aquatic food web. Primary producers synthesize their own energy without needing to eat. Many photosynthesize, using the sun’s energy to build carbohydrates.

Detailed explanation-4: -Phytoplankton is an aquatic producer.